What does the symbol for an operational amplifier look like?

The symbol for an operational amplifier is represented by a triangle, which typically points to the right, with inputs located at the base of the triangle and the output located at the apex. This conventional symbol effectively communicates the operational amplify's functionality, showcasing its input and output terminals clearly.

The triangle shape is widely recognized in schematic diagrams, allowing for easy identification by those familiar with electronics. Additionally, the labeling of the inputs and output (often denoted as inverting and non-inverting inputs and the output) provides essential information about the operational amplifier's configuration and operation, making it practical for use in various applications.

Other shapes mentioned do not accurately represent operational amplifiers. Rectangles and circles are associated with different components in electronic schematics, while a diamond shape can denote other types of devices or configurations but is not standard for operational amplifiers.